Question 1

The table shows information about the two methods of storing energy.

Method	Energy stored per 100 kg of water in kJ	Percentage of stored energy wasted	Installation
A: Increasing water temperature by 80 °C	33 600	40%	Anywhere
B: Pumping water uphill to a height of 500 m	490	25%	High mountains

Compare the advantages and disadvantages of the two methods of storing energy. Include calculations in your answer.

Accepted Answer

1.  **Calculate** the difference in energy storage. Divide the larger energy value by the smaller one to show how many times greater it is.
2.  **Calculate** the difference in wasted energy (efficiency). Subtract the smaller percentage from the larger one.
3.  **Identify** advantages for each method based on the table (e.g., high energy storage, high efficiency, installation location).
4.  **Identify** disadvantages for each method (e.g., low energy storage, low efficiency, installation restrictions).
5.  **Structure** your answer by comparing points directly, using your calculations as evidence.

Question 2

What mistakes do candidates make on this AQA GCSE question?

Accepted Answer

✗ Only describing the data without comparing.
✗ Not including any calculations.
✗ Forgetting to mention both advantages and disadvantages for the methods.

How to approach this question

Full Answer

Common mistakes

Practice the full AQA GCSE Physics Higher Tier Paper 1

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